Possible universal relation between short time β-relaxation and long time α-relaxation in glass-forming liquids.

@article{Das2018PossibleUR,
  title={Possible universal relation between short time $\beta$-relaxation and long time $\alpha$-relaxation in glass-forming liquids.},
  author={Rajsekhar Das and Indrajit Tah and Smarajit Karmakar},
  journal={The Journal of chemical physics},
  year={2018},
  volume={149 2},
  pages={
          024501
        }
}
Relaxation processes in supercooled liquids are known to exhibit interesting complex behavior. One of the hallmarks of this relaxation process observed in the measured auto correlation function is the occurrence of multiple steps of relaxations. The shorter time relaxation is known as the β-relaxation which is believed to be due to the motion of particles in the cage formed by their neighbors. The longer time relaxation is called the α-relaxation. The time scales of these two relaxations… 
View on PubMed
arxiv.org
8 Citations
Background Citations
1

8 Citations

Citation Type

Citation Type

Correlations between short- and long-time relaxation in colloidal supercooled liquids and glasses.
TLDR
The experimental observations suggest short-time relaxation events are very often precursors to heterogeneous relaxation at longer timescales in glassy materials.
Two-step relaxation and the breakdown of the Stokes-Einstein relation in glass-forming liquids.
TLDR
A classification of particles according to the rank order of their displacements is proposed, and it is shown quantitatively that the LD group is responsible for the fast relaxation in the two-step relaxation process in the intermediate scattering function, while the SD group gives rise to the slow (α) relaxation.
An alternative approach to evidence the structural conditioning in the dynamic slowdown in a polymer glass-former.
  • C. Balbuena, E. Soulé
  • Physics
    Journal of physics. Condensed matter : an Institute of Physics journal
  • 2019
TLDR
The onset of structure effects on dynamical behavior is found to be coincident with the onset of slow dynamics and SER breakdown, and the effects of structure on dynamics can be discriminated.
Time Scales of Fickian Diffusion and the Lifetime of Dynamic Heterogeneity
Dynamic heterogeneity, believed to be one of the hallmarks of the dynamics of supercooled liquids, is expected to affect the diffusion of the particles comprising the liquid. We have carried out…
Kinetic Fragility Directly Correlates with the Many-body Static Amorphous Order in Glass-Forming Liquids
The term “fragility” describes the rate at which viscosity grows when a supercooled liquid approaches its putative glass transition temperature. The field of glassy materials is actively searching…
Dynamics of Rod like Particles in Supercooled Liquids -- Probing Dynamic Heterogeneity and Amorphous Order
Probing dynamic and static correlation in glass-forming supercooled liquids has been a challenge for decades in spite of extensive research. Dynamic correlation which manifests itself as Dynamic…
Common structural basis of short- and long-time relaxation dynamics in metallic glass-forming liquids
Elastoplasticity Mediates Dynamical Heterogeneity Below the Mode Coupling Temperature.
TLDR
It is shown that long-ranged, elastically mediated facilitation appears below the mode coupling temperature, adding to the short-range component present at all temperatures, suggesting deep connections between the supercooled liquid and glass states.

References

SHOWING 1-10 OF 86 REFERENCES
An Overview on Short and Long Time Relaxations in Glass-forming Supercooled Liquids
Density fluctuations in supercooled liquids near the glass transition relax in multiple steps. The short time relaxation is known as β-relaxation and the final long time relaxation is called…
Relation between some secondary relaxations and the α relaxations in glass-forming materials according to the coupling model
Some secondary or β relaxations in glass-forming materials involve molecular motions that bear strong resemblance to the primitive α relaxations of the coupling model, although the two are not…
Short-Time Beta Relaxation in Glass-Forming Liquids Is Cooperative in Nature.
TLDR
Using finite-size scaling analysis, a growing length scale associated with beta relaxation is extracted from the observed dependence of the beta relaxation time on the system size, and it is found that the temperature dependence of this length scale is the same as that of the length scale that describes the spatial heterogeneity of local dynamics in the long-time α-relaxation regime.
Understanding the dynamics of glass-forming liquids with random pinning within the random first order transition theory.
TLDR
A scaling description relates the fragility parameter to the static length scale of RFOT and thus provides a physical understanding of fragility within the framework of the RFOT theory.
Direct estimate of the static length-scale accompanying the glass transition
Growing length and time scales in glass-forming liquids
TLDR
Finite-size scaling is performed for a realistic glass-former, using computer simulations, to evaluate the length scale associated with spatially heterogeneous dynamics, which grows as temperature decreases, and shows that relaxation times are determined by configurational entropy, in accordance with the Adam–Gibbs relation.
Scaling behavior in the beta -relaxation regime of a supercooled Lennard-Jones mixture.
TLDR
The predictions of mode-coupling-theory on the existence of a von Schweidler law are found to hold for a molecular dynamics simulation of a supercooled binary Lennard-Jones mixture and the exponents in these two power-laws are very close to satisfying the exponent relationship predicted by the mode-Coupling theory.
Relation between the α-relaxation and Johari-Goldstein β-relaxation of a component in binary miscible mixtures of glass-formers
The coupling model was applied to describe the α-relaxation dynamics of each component in perfectly miscible mixtures A1-xBx of two different glass-formers A and B. An important element of the model…
A connection between the structural α-relaxation and the β-relaxation found in bulk metallic glass-formers.
TLDR
The establishment of the correlation may facilitate the understanding of the roles played by the β-relaxation in macroscopic properties of metallic glasses including the relations to shear transformation zone, ductile-brittle transition in deformation, crystallization, and diffusion.
Short time dynamics of glass-forming liquids
Calculations have been presented for the intermediate scattering function, dynamic structure factor, and dynamic susceptibility of a complex correlated system undergoing relaxation with independent…
...
1
2
3
4
5
...